We obviously have different definitions of words. It hardly "fits perfectly" when you have to cut out the firewall.. It fits yes, but that isn't perfect. Perfect would be without chassis/ body modifications.
2; 7k's aren't 30 years old for the most part, just an fyi..
3; Because for a 650kg car, the beams IS heavy compared to a K motor the car was designed for.
You 2 have practically redesigned the entire front end of the car to give it a chance of handling.
I've said to you before what i think of "300kw beams in ke10" idea, and i stick by it.
At the end of the day it's your car, and props for doing something different, but i wouldn't be encouraging other people to do it without first directing them to one of the two threads so they can see what actually has to be done.